Why does milk turn sour in monsoons?

Do you often end up discarding milk due to its strange thickness and sour taste? Then you need to stop and read this! Milk turning sour is a common concern in most households, especially during the rainy and humid weather. There’s no denying that increased humidity and fluctuating temperatures in monsoons can create a conducive environment for bacterial growth, particularly lactic acid bacteria, which proliferates in milk and ferments lactose (milk sugar) into lactic acid.This acid lowers the pH of the milk, causing it to sour and curdle. Here are some more factors that lead to spoilage of milk and how to prevent it!
Factors that lead to souring of milk
Humidity
High humidity levels during the monsoon season can cause milk to spoil faster. Humid air can encourage the growth of bacteria and mold, accelerating the souring process.
Temperature Fluctuations
Monsoons often bring erratic temperatures. Milk stored at inconsistent temperatures can spoil quickly. Warm and cool cycles can lead to rapid bacterial growth.
Inadequate Storage
If milk is not stored properly, it is more susceptible to contamination and spoilage. Poor hygiene practices and exposure to air can also contribute to milk turning sour.

Tips for preventing Milk from turning Sour
Refrigeration
Store milk in the refrigerator at a temperature below 4°C. Keeping milk consistently cold slows bacterial growth and helps maintain its freshness.
Proper Sealing
Ensure that milk containers are tightly sealed to prevent exposure to air and contaminants. Avoid transferring milk into unclean or unsterilized containers.
Clean Environment
Maintain a clean environment in both the kitchen and refrigerator. Regularly clean and sanitize shelves and containers where milk is stored.
Avoid Temperature Fluctuation
Keep milk away from the refrigerator door, where temperatures can fluctuate. Place it in the main compartment, where the temperature is more stable.
Buy Fresh
Purchase milk with the longest possible shelf life and check expiration dates. Be mindful of the storage conditions in the store and avoid buying milk that has been left out or exposed to heat.

Easy tips to keep milk fresh
Use Ice Packs: If you need to transport milk, use ice packs or insulated bags to keep it cool. This is especially important during travel or extended periods outside refrigeration.
Check Freshness Regularly: Before using milk, check for signs of spoilage such as an off smell, curdling, or a change in texture. If any of these signs are present, discard the milk.
Smaller Quantities: Buy milk in smaller quantities that you can consume within a few days to reduce the risk of spoilage.

Quick Refrigeration: As soon as you bring milk home, refrigerate it promptly. Do not leave it out at room temperature for extended periods.
By understanding why milk turns sour during the monsoon and implementing these preventative measures, you can enjoy fresh milk throughout the season. Proper storage, cleanliness, and mindful handling are key to extending the shelf life of your milk and reducing waste.